I´ve just installed Ubuntu 18.04 LTS on my Macbook Pro, and from the outset I had trouble with system stability. Eventually I narrowed the problem down to the nvidia drivers (card is an MCP89 Geforce G320). In software and updates I set the driver to proprietory and re-booted.
On reboot the graphics are completely lost, all black. I need some stepwise help to dig myself out and get the drivers to work properly. Any help would be appreciated!